text box

noun

Etymology: From text + box.

1. A block of printed text contained within borders that is intended to be read separately from the major text of the page.

   “The graphic design of secondary schoolbooks, which includes many text boxes, captions, labelled diagrams, thought bubbles, etc., introduced a certain level of noise into the scanning and OCR[.]”

2. A rectangular widget that accepts textual input on an interactive electronic display.